British Foreign Secretary William Hague says the UK and the US have seen evidence that Syria is preparing to use chemical weapons. There was enough evidence from intelligence sources to know “that they need a warning,” he said Saturday at a security conference in Bahrain. The President of the United Sates warned of serious consequences and he meant it,” said the British minister. British intelligence sources told the BBC that Syria's chemical weapons are concentrated at five air bases and are being closely watched. They said contingency plans have been drawn up if they show signs of being readied to be loaded and used as weapons.